#define _CRT_SECURE_NO_WARNINGS 1

int TreeLeafSize(BTNode* root)
{
	if()
}



BTNode* TreeFind(BTNode* root, BTDataType x)
{
	if (root == NULL)
		return;
	if (root->val == x)
		return root;
	BTData* ret = TreeFind(root->left);

	if (ret !=  NULL)
		return ret;
	return TreeFind(root->right);
}